When I spec out new hardware, I check the support across platforms. I gave up buying hardware that limited me to a single platform years ago.

In the case of specialty hardware, that may indicate the need for a specialty workstation. Your distro choice of Linux may be as unsuited to audio processing (random guess) as Windows would be to a transparent IDS/IPS or security testing toolkit.

You could also followup with your hardware vendors asking why they only support one or two platforms. They could have support for there hardware written at no cost to them beyond providing the interface specs so "we don't have budget to write drivers" is not an excuse.

The only way hardware vendors are going to take interest is if the consumer base starts asking more questions. If you honestly want hardware supported across platforms, vote with your wallet and buy hardware from vendors that support choice.